A better auto brightness (daf7d410) · Commits · e / os / android_frameworks_base

core/java/android/os/PowerManager.java

+0 −9

Original line number	Diff line number	Diff line
		@@ -365,15 +365,6 @@ public final class PowerManager {
		com.android.internal.R.integer.config_screenBrightnessSettingDefault);
		}

		/**
		* Returns true if the screen auto-brightness adjustment setting should
		* be available in the UI. This setting is experimental and disabled by default.
		* @hide
		*/
		public static boolean useScreenAutoBrightnessAdjustmentFeature() {
		return SystemProperties.getBoolean("persist.power.useautobrightadj", false);
		}

		/**
		* Returns true if the twilight service should be used to adjust screen brightness
		* policy. This setting is experimental and disabled by default.

packages/SystemUI/res/layout/status_bar_toggle_slider.xml

+3 −0

Original line number	Diff line number	Diff line
		@@ -29,6 +29,7 @@
		android:layout_alignParentBottom="true"
		android:button="@null"
		android:background="@*android:drawable/switch_track_quantum"
		android:visibility="gone"
		/>
		<com.android.systemui.settings.ToggleSeekBar
		android:id="@+id/slider"
		@@ -36,6 +37,7 @@
		android:layout_height="wrap_content"
		android:layout_toEndOf="@id/toggle"
		android:layout_centerVertical="true"
		android:layout_alignParentStart="true"
		android:layout_alignParentEnd="true"
		android:paddingStart="20dp"
		android:paddingEnd="20dp"
		@@ -51,5 +53,6 @@
		android:paddingTop="26dp"
		android:textColor="#666666"
		android:textSize="12sp"
		android:visibility="gone"
		/>
		</merge>

packages/SystemUI/src/com/android/systemui/settings/BrightnessController.java

+55 −22

Original line number	Diff line number	Diff line
		@@ -28,7 +28,6 @@ import android.os.RemoteException;
		import android.os.ServiceManager;
		import android.os.UserHandle;
		import android.provider.Settings;
		import android.provider.Settings.SettingNotFoundException;
		import android.widget.ImageView;

		import java.util.ArrayList;
		@@ -36,6 +35,12 @@ import java.util.ArrayList;
		public class BrightnessController implements ToggleSlider.Listener {
		private static final String TAG = "StatusBar.BrightnessController";

		/**
		* {@link android.provider.Settings.System#SCREEN_AUTO_BRIGHTNESS_ADJ} uses the range [-1, 1].
		* Using this factor, it is converted to [0, BRIGHTNESS_ADJ_RESOLUTION] for the SeekBar.
		*/
		private static final float BRIGHTNESS_ADJ_RESOLUTION = 100;

		private final int mMinimumBacklight;
		private final int mMaximumBacklight;

		@@ -51,6 +56,8 @@ public class BrightnessController implements ToggleSlider.Listener {
		private ArrayList<BrightnessStateChangeCallback> mChangeCallbacks =
		new ArrayList<BrightnessStateChangeCallback>();

		private boolean mAutomatic;

		public interface BrightnessStateChangeCallback {
		public void onBrightnessLevelChanged();
		}
		@@ -62,6 +69,8 @@ public class BrightnessController implements ToggleSlider.Listener {
		Settings.System.getUriFor(Settings.System.SCREEN_BRIGHTNESS_MODE);
		private final Uri BRIGHTNESS_URI =
		Settings.System.getUriFor(Settings.System.SCREEN_BRIGHTNESS);
		private final Uri BRIGHTNESS_ADJ_URI =
		Settings.System.getUriFor(Settings.System.SCREEN_AUTO_BRIGHTNESS_ADJ);

		public BrightnessObserver(Handler handler) {
		super(handler);
		@@ -77,7 +86,10 @@ public class BrightnessController implements ToggleSlider.Listener {
		if (selfChange) return;
		if (BRIGHTNESS_MODE_URI.equals(uri)) {
		updateMode();
		} else if (BRIGHTNESS_URI.equals(uri)) {
		updateSlider();
		} else if (BRIGHTNESS_URI.equals(uri) && !mAutomatic) {
		updateSlider();
		} else if (BRIGHTNESS_ADJ_URI.equals(uri) && mAutomatic) {
		updateSlider();
		} else {
		updateMode();
		@@ -97,6 +109,9 @@ public class BrightnessController implements ToggleSlider.Listener {
		cr.registerContentObserver(
		BRIGHTNESS_URI,
		false, this, UserHandle.USER_ALL);
		cr.registerContentObserver(
		BRIGHTNESS_ADJ_URI,
		false, this, UserHandle.USER_ALL);
		}

		public void stopObserving() {
		@@ -163,10 +178,8 @@ public class BrightnessController implements ToggleSlider.Listener {
		}

		public void onChanged(ToggleSlider view, boolean tracking, boolean automatic, int value) {
		setMode(automatic ? Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC
		: Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);
		updateIcon(automatic);
		if (!automatic) {
		updateIcon(mAutomatic);
		if (!mAutomatic) {
		final int val = value + mMinimumBacklight;
		setBrightness(val);
		if (!tracking) {
		@@ -178,6 +191,18 @@ public class BrightnessController implements ToggleSlider.Listener {
		}
		});
		}
		} else {
		final float adj = value / (BRIGHTNESS_ADJ_RESOLUTION / 2f) - 1;
		setBrignessAdj(adj);
		if (!tracking) {
		AsyncTask.execute(new Runnable() {
		public void run() {
		Settings.System.putFloatForUser(mContext.getContentResolver(),
		Settings.System.SCREEN_AUTO_BRIGHTNESS_ADJ, adj,
		UserHandle.USER_CURRENT);
		}
		});
		}
		}

		for (BrightnessStateChangeCallback cb : mChangeCallbacks) {
		@@ -198,6 +223,13 @@ public class BrightnessController implements ToggleSlider.Listener {
		}
		}

		private void setBrignessAdj(float adj) {
		try {
		mPower.setTemporaryScreenAutoBrightnessAdjustmentSettingOverride(adj);
		} catch (RemoteException ex) {
		}
		}

		private void updateIcon(boolean automatic) {
		if (mIcon != null) {
		mIcon.setImageResource(automatic ?
		@@ -210,15 +242,12 @@ public class BrightnessController implements ToggleSlider.Listener {
		private void updateMode() {
		if (mAutomaticAvailable) {
		int automatic;
		try {
		automatic = Settings.System.getIntForUser(mContext.getContentResolver(),
		Settings.System.SCREEN_BRIGHTNESS_MODE,
		Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL,
		UserHandle.USER_CURRENT);
		} catch (SettingNotFoundException snfe) {
		automatic = 0;
		}
		mControl.setChecked(automatic != 0);
		updateIcon(automatic != 0);
		mAutomatic = automatic != 0;
		updateIcon(mAutomatic);
		} else {
		mControl.setChecked(false);
		updateIcon(false /automatic/);
		@@ -227,16 +256,20 @@ public class BrightnessController implements ToggleSlider.Listener {

		/** Fetch the brightness from the system settings and update the slider */
		private void updateSlider() {
		if (mAutomatic) {
		float value = Settings.System.getFloatForUser(mContext.getContentResolver(),
		Settings.System.SCREEN_AUTO_BRIGHTNESS_ADJ, 0,
		UserHandle.USER_CURRENT);
		mControl.setMax((int) BRIGHTNESS_ADJ_RESOLUTION);
		mControl.setValue((int) ((value + 1) * BRIGHTNESS_ADJ_RESOLUTION / 2f));
		} else {
		int value;
		try {
		value = Settings.System.getIntForUser(mContext.getContentResolver(),
		Settings.System.SCREEN_BRIGHTNESS,
		Settings.System.SCREEN_BRIGHTNESS, mMaximumBacklight,
		UserHandle.USER_CURRENT);
		} catch (SettingNotFoundException ex) {
		value = mMaximumBacklight;
		}
		mControl.setMax(mMaximumBacklight - mMinimumBacklight);
		mControl.setValue(value - mMinimumBacklight);
		}
		}

		}

services/core/java/com/android/server/display/AutomaticBrightnessController.java

+1 −2

Original line number	Diff line number	Diff line
		@@ -48,8 +48,7 @@ class AutomaticBrightnessController {
		private static final boolean DEBUG_PRETEND_LIGHT_SENSOR_ABSENT = false;

		// If true, enables the use of the screen auto-brightness adjustment setting.
		private static final boolean USE_SCREEN_AUTO_BRIGHTNESS_ADJUSTMENT =
		PowerManager.useScreenAutoBrightnessAdjustmentFeature();
		private static final boolean USE_SCREEN_AUTO_BRIGHTNESS_ADJUSTMENT = true;

		// The maximum range of gamma adjustment possible using the screen
		// auto-brightness adjustment setting.